=over

=item shmget KEY,SIZE,FLAGS
X<shmget>

Calls the System V IPC function shmget.  Returns the shared memory
segment id, or L<C<undef>|/undef EXPR> on error.
See also L<perlipc/"SysV IPC"> and the documentation for
L<C<IPC::SysV>|IPC::SysV>.

Portability issues: L<perlport/shmget>.

=back